1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Frderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16 of the MPEG specifications. 17 18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20 individually for the purpose of encoding or decoding bit streams in products that are compliant with 21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23 software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27 applications information and documentation. 28 29 2. COPYRIGHT LICENSE 30 31 Redistribution and use in source and binary forms, with or without modification, are permitted without 32 payment of copyright license fees provided that you satisfy the following conditions: 33 34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35 your modifications thereto in source code form. 36 37 You must retain the complete text of this software license in the documentation and/or other materials 38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40 modifications thereto to recipients of copies in binary form. 41 42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43 prior written permission. 44 45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46 software or your modifications thereto. 47 48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49 and the date of any change. For modified versions of the FDK AAC Codec, the term 50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 52 53 3. NO PATENT LICENSE 54 55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57 respect to this software. 58 59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60 by appropriate patent licenses. 61 62 4. DISCLAIMER 63 64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69 or business interruption, however caused and on any theory of liability, whether in contract, strict 70 liability, or tort (including negligence), arising in any way out of the use of this software, even if 71 advised of the possibility of such damage. 72 73 5. CONTACT INFORMATION 74 75 Fraunhofer Institute for Integrated Circuits IIS 76 Attention: Audio and Multimedia Departments - FDK AAC LL 77 Am Wolfsmantel 33 78 91058 Erlangen, Germany 79 80 www.iis.fraunhofer.de/amm 81 amm-info (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /*! 85 \file 86 \brief missing harmonics detection header file 87 */ 88 89 #ifndef __MH_DETECT_H 90 #define __MH_DETECT_H 91 92 #include "sbr_encoder.h" 93 #include "fram_gen.h" 94 95 typedef struct 96 { 97 FIXP_DBL thresHoldDiff; /*!< threshold for tonality difference */ 98 FIXP_DBL thresHoldDiffGuide; /*!< threshold for tonality difference for the guide */ 99 FIXP_DBL thresHoldTone; /*!< threshold for tonality for a sine */ 100 FIXP_DBL invThresHoldTone; 101 FIXP_DBL thresHoldToneGuide; /*!< threshold for tonality for a sine for the guide */ 102 FIXP_DBL sfmThresSbr; /*!< tonality flatness measure threshold for the SBR signal.*/ 103 FIXP_DBL sfmThresOrig; /*!< tonality flatness measure threshold for the original signal.*/ 104 FIXP_DBL decayGuideOrig; /*!< decay value of the tonality value of the guide for the tone. */ 105 FIXP_DBL decayGuideDiff; /*!< decay value of the tonality value of the guide for the tonality difference. */ 106 FIXP_DBL derivThresMaxLD64; /*!< threshold for detecting LP character in a signal. */ 107 FIXP_DBL derivThresBelowLD64; /*!< threshold for detecting LP character in a signal. */ 108 FIXP_DBL derivThresAboveLD64; /*!< threshold for detecting LP character in a signal. */ 109 }THRES_HOLDS; 110 111 typedef struct 112 { 113 INT deltaTime; /*!< maximum allowed transient distance (from frame border in number of qmf subband sample) 114 for a frame to be considered a transient frame.*/ 115 THRES_HOLDS thresHolds; /*!< the thresholds used for detection. */ 116 INT maxComp; /*!< maximum alllowed compensation factor for the envelope data. */ 117 }DETECTOR_PARAMETERS_MH; 118 119 typedef struct 120 { 121 FIXP_DBL *guideVectorDiff; 122 FIXP_DBL *guideVectorOrig; 123 UCHAR* guideVectorDetected; 124 }GUIDE_VECTORS; 125 126 127 typedef struct 128 { 129 INT qmfNoChannels; 130 INT nSfb; 131 INT sampleFreq; 132 INT previousTransientFlag; 133 INT previousTransientFrame; 134 INT previousTransientPos; 135 136 INT noVecPerFrame; 137 INT transientPosOffset; 138 139 INT move; 140 INT totNoEst; 141 INT noEstPerFrame; 142 INT timeSlots; 143 144 UCHAR *guideScfb; 145 UCHAR *prevEnvelopeCompensation; 146 UCHAR *detectionVectors[MAX_NO_OF_ESTIMATES]; 147 FIXP_DBL tonalityDiff[MAX_NO_OF_ESTIMATES/2][MAX_FREQ_COEFFS]; 148 FIXP_DBL sfmOrig[MAX_NO_OF_ESTIMATES/2][MAX_FREQ_COEFFS]; 149 FIXP_DBL sfmSbr[MAX_NO_OF_ESTIMATES/2][MAX_FREQ_COEFFS]; 150 const DETECTOR_PARAMETERS_MH *mhParams; 151 GUIDE_VECTORS guideVectors[MAX_NO_OF_ESTIMATES]; 152 } 153 SBR_MISSING_HARMONICS_DETECTOR; 154 155 typedef SBR_MISSING_HARMONICS_DETECTOR *HANDLE_SBR_MISSING_HARMONICS_DETECTOR; 156 157 void 158 FDKsbrEnc_SbrMissingHarmonicsDetectorQmf(HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector, 159 FIXP_DBL ** pQuotaBuffer, 160 INT ** pSignBuffer, 161 SCHAR *indexVector, 162 const SBR_FRAME_INFO *pFrameInfo, 163 const UCHAR* pTranInfo, 164 INT* pAddHarmonicsFlag, 165 UCHAR* pAddHarmonicsScaleFactorBands, 166 const UCHAR* freqBandTable, 167 INT nSfb, 168 UCHAR * envelopeCompensation, 169 FIXP_DBL *pNrgVector); 170 171 INT 172 FDKsbrEnc_CreateSbrMissingHarmonicsDetector ( 173 HANDLE_SBR_MISSING_HARMONICS_DETECTOR hSbrMHDet, 174 INT chan); 175 176 INT 177 FDKsbrEnc_InitSbrMissingHarmonicsDetector( 178 HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector, 179 INT sampleFreq, 180 INT frameSize, 181 INT nSfb, 182 INT qmfNoChannels, 183 INT totNoEst, 184 INT move, 185 INT noEstPerFrame, 186 UINT sbrSyntaxFlags); 187 188 void 189 FDKsbrEnc_DeleteSbrMissingHarmonicsDetector (HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector); 190 191 192 INT 193 FDKsbrEnc_ResetSbrMissingHarmonicsDetector (HANDLE_SBR_MISSING_HARMONICS_DETECTOR hSbrMissingHarmonicsDetector, 194 INT nSfb); 195 196 #endif 197
